Feed-reversing mechanism and stop-motion



No. 6l7,567. Patented lan l0, I899.

H. L. FLATHER.

FE ED REVEBSING MECHANISM AND STOP MOTION.

(Application filed Feb. 4, 1898.)

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(No Model.)

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W/TNEEEEE. @w% 6 No. 617,567. Patented lan. l0, I899.

H. L. FLATHER.

FEED BEVEBSING MECHANISM AND STOP MOTION.

(Application filed Feb. 4, 1898.)

3 she ts-sheet 2.

(No Model.)

s me Q9 MM m: NORRIS PETERS co, mom-mum. mamas-60k. 6. o.

No. 6l7,567. Patented Jan. I0, I899.

H; L. FLATHER.

FEED REVERSING MECHANISM AND STOPMOTION.

. (Application filed Feb. 4, 1898.) 3 Sheeis-$fieet 3.

(No Model.)

W/TNEEEIEEL @w 6 QM wm km co. morauma, WASHINGTON u. c,

UNITED STATES PATENT OFFICE.

HERBERT L. FLATHER, OF NASI-IUA, NEW HAMPSHIRE.

FEED-REVERSING MECHANISM AND STOP-MOTI ON.

SPECIFICATION forming part of Letters Patent No. 617,567, dated J'anuaryiIO, 1899. Application filed February 4, 1898- Serial No. 669,166. (No model.)

To all 1071,0112, it may concern:

Be it known that I, HERBERTL. FLATHER, a citizen of the United States, residing at Nashua, county of Hillsborough, and State of New Hampshire, have invented certain new and useful Improvements in an Automatic Stop-Motion and Feed-Reversin g Mechanism; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a feed-reversing mechanism and an automatic stop-motion connected therewith, together with an improvement in the bearings for the upper feedshaft and clutch mounted thereon.

The object of my invention is to arrange the upper feed-shaft so as to reduce the gears necessary to produce a right and left feed to a minimum and at the same time to arrange the bearings for the upper feed-shaft and clutch mounted thereon so that the tendency to cramp the clutch and spring the upper feedshaft out of alinement when coarse threads and heavy cuts are being taken is entirely eliminated.

A further object of my invention is to pro vide a feed-reversing rod that may be operated from the apron by the operator for the purpose of causing the carriage to feed in either direction or to throw the feedworks out of operation entirely, or the reversingrod may be operated upon by adjustable stops provided with cone-headed adj ustingscrews which contactwith a projection mounted on the reversing-rod and operates to stop the feedworks when the carriage is feeding 1n either direction.

Another ob ect of my invention is to'arrange and construct the adjustable stops so feed-shaft clutch and gears mounted thereon and sections of the lead-screw, feed-rod, and the clutch-operating rod and its connecting mechanism. Fig. 2 is an end elevation of the same and shows the casing attached to the outer end of the head-stock in which the upper feed-shaft has a bearing, together with the feed, gearing, and a portion of the carriage. Fig. 3 is a detached side elevation of the handle, which is mounted to slide on the reversing-rod and used to turn said reversing-rod in operating the clutch. Fig. 3 represents a side elevation and a front elevation of the reverse-rod bearing, which is at tached to the apron'of the tool-carriage in which the reverse-rod is revolubly and longitudinally movable. tion through the line 4 4, Fig. 1, and shows an end View of the clutch and clutch-operating mechanism. Fig. 5 is a front sectional elevation of a portion of the lathe-bed and the tail-stock mounted thereon, together with a section of the carriage, feed-screw, feed-rod, reversing-rod, and the stops and handle for operating the same.

Similar letters refer to similar parts throughout the several views.

A represents a lathe -bed, on which are mounted the head-stock B and the carriage O. The head-stock B has bearings, inwhich are revolubly mounted the live-spindle B, which is provided with a cone-pulley and back-gears such as are usually found in engine-lathes. The gears D and E are revolubly mounted on the live-spindle B on either side of the bearing B F is the upper feed-shaft and has loosely mounted thereon the feed-gears D and E, which are driven by the gears D and E, the gear E being driven by the gear E through the medium of the intermediate gear E which meshes with the said gears E and E.

F is a clutch mounted on the upper feedshaft F with spline, so that it revolves with said feed-shaft F, but has a free longitudinal movement on the same. It is also provided with a bearing in the head-stock'for its outer surface. Said clutch F is provided with the clutch-teeth F and F The clutch-tooth F is adapted to engage with the clutch-tooth D which is attached to the inner side of the Fig. 4: is a cross-see" gear D, while the clutch-tootl1 F is adapted to engage the clutch-tooth E attached to the inner side of the gear E.

G is a casing attached to the rearend of the head-stock l3 and inclosiug the gears E, E, and E and is provided with the bearing G for the stop-screw of the live-spindle B and the bearing G2 for the outer end of the upper feed-shaft F.

The location of the bearing G is an important feature of my invention, as it places said bearing near the feed-gears and feedcone, and thereby prevents the tendency to cramp said feed-shaft F by reason of the strains incident to use.

H represents a clutch-lever,one end of which is forked and provided with the studs 11 H, which operate in the groove in the clutch F. The outer end of the clutch-lever II is screwed to one end of the rocker-shaft H Said rocker-shaft H is provided with the bearing H in which it freely oscillates. To the other end of the rocker-shaft H is attached the lever H by one of its ends, its other end being provided with the gear-teeth 11 which mesh with the spur-gear I. The spur-gear I has the bevel-gear l secured to its inner face. The said gears I and I have a bearing and revolve freely on the stud 1 which is secured to the bed of the lathe. The bevel-gear I is attached to one end of the reverse-rod K and is adapted to mesh with the bevel-gear I. Said reverse-rod K has the bearing K at one end and the bearing K at its other end and the bearing L attached to the carriage intermediate said bearings K and K L is a sleeve which surrounds the clutchrod K and is adapted to freely oscillate in the bearing L. Said sleeve L is provided with the key L which fits loosely in a keyway in the reverse-rod K, thereby permitting a free longitudinal movement of the sleeve L on the rod K, but compelling them to rotate together. The sleeve L is provided with the handle L the projection L, and the collar L to confine it in place.

M and N are adjustable stops and are adapted to be attached to the bottom of the lathe-bed A on its front edge at any point between the legs of the lathe. The stop M is provided with the binding-screw M and the cone-headed adj usting-screw M which is adapted to contact with the projection L while the stop N has the binding-screw N and the cone-headed adjusting-screw N adapted to contact with the projection L The adj Listing-screws M and N have threaded hearings in projecting portions of the adjustable stops M and N, and the said projecting portions are shaped to permit the projection L to pass freely by them when it is in a central position and the feedworks are out of operation. Vhen the feedworks are in operation and the tool is cutting in either direction, the projection L is either thrown up or down and in the path of one of the adjusting-screws M or N so that when the cutting-tool has reached the point at which the operator has set the adjustable stops to throw the feedworks out of operation the projection L will contact with one of the adj ustingscrews M or N and be thereby thrown into its central position, stop the feedworks, and freely pass by both adjustable stops. The series of feed-gears O, 0, 0 O", and 0 drive the feed-screw R from the upper feed-shaft F. The said feed-screw B may also be driven by a belt running on the cone-pulleys I and P, the pulley P being'mounted in the outer end of the feed-shaft F and the pulley P on the outer end of the feed-screw R.

S is the feed-rod, which is driven by the feed-screw R through the medium of the gears T and T. Said feed-screw R and the feed-rod S revolve in the bearings K and K attached to the lathe-bed A.

\V is an adjustable swinging arm which is pivoted 011 a projection of the bearing K and is provided with the stud W, secured in the slot V Said stud \V' has revolubly mounted thereon the gears O and 0 The swinging arm is also provided with the stud 7 upon which is revolubly mounted the gear 0, and the binding-screw W secures the said swinging arm \V in position and operates in slot W.

X is a stud secured in the head-stock upon which the gear E is revolubly mounted. The gear E has sufficient longitudinal movement on the stud X to permit the operator to disengage it from the gears E and E, if desired.

L is a locking-pin which has a bearing in the bearing L. It is pressed outward by the spiral spring L", which surrounds it. The lockingpin L is provided with a cone-shaped head adapted to engage in any one of the series of holes L L L in the inside of the handle L. The series of holes L L L and the lockingpin L are provided for the purpose of retaining the handle L in either of its positionsto wit, for driving the carriage either to the right or left or when the feed mechanism is out ofoperation.

F represents the step or thrust bearing of the live-spindle B, which has a threaded bearing in the casing G.

The adj usting-screws M and N are used for the purpose of obtaining a fine adjustment of the stops in cases Where the work being done has slight variations in length.

A worm 0r spiral cam operating on wormgear teeth may be used instead of the bevelgears I and l or fixed cones or cams attached to the stops M and N in place of the adj usting-screws M and N without departing from the spirit'of my invention.

What- I claim is 1 1. In a lathe, the combination of a headstock with a casing attached to its rear end which is provided with a threaded bearing to receive the live-spindle step, and a bearing for the outer end of the upper feed-shaft, two series of feed-gears connecting the said live-spindle and the upper feed-shaft, one of said series of feed-gears being inclosed by said casing.

2. In a lathe, the combination of a lathebed having adjustable stops attached thereto, adjusting-screws having a threaded bearing in said stops, a reversing-rod having a proj ection mounted thereon, longitudinally movable and rotating therewith and means for operating the clutch mounted on the upper feed-shaft from the reversing-rod.

3. In a lathe, the combination with adj ustable stops' movably mounted on the lathebed, of a longitudinally-movable projection mounted on the reversing-rod, means for contacting said projection with said stops and automatically throwing it out of their path and the means for connecting said reversingrod and the clutch on the upper feed-shaft.

at. In a lathe, automatic'stop mechanism consisting of adjustable stops attached to the lathe-bed, a reversing-rod operated by said adjustable stops, bevel-gears connecting the reversing-rod and a spur-gear, alever having gear-teeth cut in one of its ends adapted to engage the spur-gear, and means for connecting the lever and a clutch.

5. In a lathe, the hereindescribed feed mechanism'consisting of feed-gears mounted on the live-spindle on either side of its rear bearing; a support attached to the rear end of the head-stock; an upper feed-shaft one iced-shaft, feed-gears mounted thereon and end of which has a bearing in said support, its other end having a bearing in the headstock; feed-gears loosely mounted on the upper feed-shaft, and a clutch mounted on said upper feed-shaft adapted to engage either of said feed-gears, said clutch having a bearing on the feed-shaft and a bearing in the headstock, and means for engaging and automatically disengaging said clutch, as shown.

6. Automatic stop mechanism, consisting of adjustable stops having adjustable contact-screws threaded therein, a reversing-rod having a 1ongitudinally movable projection mounted thereon adapted to contact with said adjustable stops and be automatically thrown out of their path. i

7. Feed mechanism consisting of an upper driven from the live-spindle, a clutch having a bearing on said upper feed-shaft and a bearing for its outer surface in the headstock, means for connecting said clutch with the reversing-rod and automatic stops for operating said reversing-rod.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 12th day of January, A. D. 1898.

HERBERT L. FLATHER.

Witnesses:

R. P. ELLIOTT, EDWARD T. BEACH. 

